This is my first attempt of using samyang 14 mm. it is absolutely sharp and easy to use. The lens has a big rounded glass in front so it is not possible to use a normal filters such as UV and ND(See the photo below). In my opinion it is a downside of the lens. It has also a barrel distortion which may/may not be corrected in lightroom or other photography softwares. The picture below is located very close to where we are living close to Granåsen gård.
See the picture in large version by: http://bit.ly/14mmsamyang